public AppleReceiptVerificationResult(string errorMessage, IapVerificationResultStatus status,
AppleAppReceipt receipt)
{
Message = errorMessage;
Status = status;
Receipt = receipt;
}
public AppleReceiptVerificationResult(IapVerificationResultStatus status,
AppleAppReceipt receipt,
string message)
{
Receipt = receipt;
Status = status;
Message = message;
}
public async Task <AppleReceiptVerificationResult> VerifyAppleReceiptAsync(string receiptData)
{
// 1. Validate incoming arguments
if (string.IsNullOrEmpty(receiptData))
{
_log.Information("receiptData cannot be empty");
return(new AppleReceiptVerificationResult("receiptData cannot be empty",
IapVerificationResultStatus.WrongArgument));
}
// 2. Prevalidate Receipt (Optional)
try
{
byte[] data = Convert.FromBase64String(receiptData);
AppleAppReceipt receipt = _receiptParserService.GetAppleReceiptFromBytes(data);
// a. Validate bundle ID
if (receipt != null && !_settings.AllowedBundleIds.Contains(receipt.BundleId))
{
_log.Information("Receipt has wrong bundle ID {bundle_id}", receipt.BundleId);
return(new AppleReceiptVerificationResult($"Receipt has wrong bundle ID {receipt.BundleId}",
IapVerificationResultStatus.WrongArgument));
}
if (_customValidation != null)
{
// if custom Validator implemented
AppleReceiptVerificationResult validationResult = _customValidation.ValidateReceipt(receipt);
if (validationResult == null || validationResult.Status != IapVerificationResultStatus.Ok)
{
// and custom validation doesn't passed - failed
return(validationResult);
}
}
}
catch (Exception e)
{
_log.Error(e,
"Something went wrong in receipt prevalidation. Seems to be invalid receipt data. Skip this step.");
}
// 3. Validate Receipt in Apple (verification in IAP)
try
{
_log.Debug("Start receipt verification in IAP...");
IAPVerificationRequest request =
new IAPVerificationRequest(receiptData, _settings.VerifyReceiptSharedSecret);
IAPVerificationResult iapVerificationResult =
await _restService.ValidateAppleReceiptAsync(request).ConfigureAwait(false);
if (iapVerificationResult == null)
{
return(new AppleReceiptVerificationResult("IAP receipt verification failed. Apple returned empty receipt.",
IapVerificationResultStatus.InternalVerificationFailed));
}
IapVerificationResultStatus iapStatus = iapVerificationResult.StatusCode;
// 1.If status <> 0 - failed
if (iapStatus != IapVerificationResultStatus.Ok)
{
return(new AppleReceiptVerificationResult("IAP receipt verification failed",
iapStatus,
iapVerificationResult.Receipt));
}
// 2. If there is no information about receipt - failed.
if (iapVerificationResult.Receipt == null)
{
_log.Information("IAP Receipt Verification failed due empty receipt");
return(new AppleReceiptVerificationResult("IAP Receipt Verification failed due empty receipt.",
IapVerificationResultStatus.InternalVerificationFailed));
}
_log.Information("IAPReceipt Verification passed.");
return(new AppleReceiptVerificationResult(iapVerificationResult.StatusCode,
iapVerificationResult.Receipt, "Everything is OK."));
}
catch (Exception e)
{
_log.Error(e, "Something went wrong in IAP receipt verification");
return(new AppleReceiptVerificationResult("Something went wrong in IAP receipt verification",
IapVerificationResultStatus.InternalVerificationBroken));
}
}
public AppleReceiptVerificationResult(string message, IapVerificationResultStatus status)
{
Message = message;
Status = status;
Receipt = null;
}